Excessive Nitrogen Causes Poor Coloring of Tomato

Tomato Fruit. the Four on the Right Show Poor Coloring. There Is No Gradual Transition between the Red and Green Color. the Two Tomato Fruit on the Left Are Normal. 

The Pericarp of the Green Part of the Tomato Fruit Is Full of Hard, Brown Vessels. These Vessels Develop during the Growth Period of the Fruit, and Affect Its Size and Color.

How these hard brown vessels retard the normal ripening process and prevent the green pericarp from changing color is not yet known. The mechanism by which excessive nitrogen causes poor coloring in tomato is still unknown.

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